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Input: elantech - enable middle button of touchpads on ThinkPad P52 

PNPID is better way to identify the type of touchpads.
Enable middle button support on 2 types of touchpads on Lenovo P52.

Cc: stable@vger.kernel.org
Signed-off-by: Aaron Ma <aaron.ma@canonical.com>
Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Aaron Ma 2018-06-21 17:14:01 -07:00 committed by Dmitry Torokhov
parent 01f7e67a05
commit 24bb555e6e
1 changed files with 8 additions and 1 deletions
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9
drivers/input/mouse/elantech.c
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@ -1175,6 +1175,12 @@ static const struct dmi_system_id elantech_dmi_has_middle_button[] = {
{ }
};
static const char * const middle_button_pnp_ids[] = {
"LEN2131", /* ThinkPad P52 w/ NFC */
"LEN2132", /* ThinkPad P52 */
NULL
};
/*
* Set the appropriate event bits for the input subsystem
*/
@ -1194,7 +1200,8 @@ static int elantech_set_input_params(struct psmouse *psmouse)
__clear_bit(EV_REL, dev->evbit);
__set_bit(BTN_LEFT, dev->keybit);
if (dmi_check_system(elantech_dmi_has_middle_button))
if (dmi_check_system(elantech_dmi_has_middle_button) ||
psmouse_matches_pnp_id(psmouse, middle_button_pnp_ids))
__set_bit(BTN_MIDDLE, dev->keybit);
__set_bit(BTN_RIGHT, dev->keybit);